Book Image

Tabular Modeling with SQL Server 2016 Analysis Services Cookbook

By : Derek Wilson
Book Image

Tabular Modeling with SQL Server 2016 Analysis Services Cookbook

By: Derek Wilson

Overview of this book

SQL Server Analysis Service (SSAS) has been widely used across multiple businesses to build smart online analytical reporting solutions. It includes two different types of modeling for analysis services: Tabular and Multi Dimensional. This book covers Tabular modeling, which uses tables and relationships with a fast in-memory engine to provide state of the art compression algorithms and query performance. The book begins by quickly taking you through the concepts required to model tabular data and set up the necessary tools and services. As you learn to create tabular models using tools such as Excel and Power View, you’ll be shown various strategies to deploy your model on the server and choose a query mode (In-memory or DirectQuery) that best suits your reporting needs. You’ll also learn how to implement key and newly introduced DAX functions to create calculated columns and measures for your model data. Last but not least, you’ll be shown techniques that will help you administer and secure your BI implementation along with some widely used tips and tricks to optimize your reporting solution. By the end of this book, you’ll have gained hands-on experience with the powerful new features that have been added to Tabular models in SSAS 2016 and you’ll be able to improve user satisfaction with faster reports and analytical queries.
Table of Contents (18 chapters)
Tabular Modeling with SQL Server 2016 Analysis Services Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Creating calculated columns


When creating DAX formulas, there are two ways to apply them to the model. The first is to create a calculated column. When you add a calculated column to the model, it applies the function on a row-by-row basis. For example, if you want to parse the datetime format of a table to only show the current year, adding a new calculated column would evaluate the formula on the date column and add it to a new column on the table evaluated once for each row in the table. When the data is refreshed, the formula is evaluated on the table and no user interaction is required for the formula to be applied to its context.

How to do it...

  1. Open Visual Studio and the tabular model project.

  2. On the CRASH_DATA_T table, review the CRASH_DATE column. It is a Date column that includes a timestamp.

  3. Scroll to the end of the CRASH_DATA_T table and enter the DAX expression to parse the year from the Crash_date column:

            =YEAR(CRASH_DATA_T[CRASH_DATE])
  4. The tabular engine will now immediately...